SirStone
e0bfa9b5e1
The question was whether we can fight a genuine legacy leader bot in Tank Royale. Answer: the API side is now PROVEN, not estimated. KEY FINDING: the classic robocode.* API is a thin delegation layer over a public seam. javap -c shows AdvancedRobot forwarding every call to _RobotBase.peer (IBasicRobotPeer/IAdvancedRobotPeer), and _RobotBase.setPeer is public final. So we do NOT need to reimplement the API: we reuse the genuine robocode.jar and implement only the 75-method peer interface. Consequences: - DrussGT's 22 sources compile against the real API with ZERO unresolved symbols. (The literal 22-file javac fails only on two PRE-EXISTING duplicate classes - GFRange and Indice are declared both inline in DrussGunDC.java and as standalone files - and the 6 classes that ship without source. The jar supplies all of them, so a shim never cares.) - Runtime smoke test PASSES: the unmodified DrussGT.jar is loaded through a child URLClassLoader and driven for 200 synthetic ticks, emitting movement intents every tick and 169 fire requests, with its thread surviving. This is the cheap path to the 'final boss', and it also unlocks the whole roborumble archive rather than one bot. Traps found by measurement: - ScannedRobotEvent's constructor order is (name, energy, bearing, distance, heading, velocity) - NOT heading-before-bearing. The wrong order silently yields distance=0, an immediate KD-tree insert and an NPE in EnemyMoves.predict; it hung the first smoke run. - RobocodeFileOutputStream has a hard engine dependency (resolves IThreadManagerBase via ContainerBase) and throws 'ThreadManager cannot be null!' outside the engine, killing the bot thread. Reached from DrussGT's own contain() error logging, so it must be stubbed. - robocode.RobotDeathEvent is required and was NOT in the predicted API list. - Bullet.equals() is genuinely called for bullet identity, not just getters. REMAINING WORK (README section 5): coordinate rotation DONE, execute()->tick bridge DONE and proven, ThreadManager fix scoped. The main open item is the classic motion model (setAhead distance semantics vs TR speed), estimated 1-3 days, plus event synthesis/ordering, gun heat, bullet identity, round and radar cadence, and firing translation. NO API UNKNOWNS REMAIN. Physics fidelity will still diverge from classic - expect to retune. Jars stay out of git (blocked by tools/robocode_shim/.gitignore); the genuine robocode.jar and DrussGT.jar are referenced from /tmp via ROBOCODE_JAR / DRUSSGT_JAR.
25 lines
838 B
Bash
Executable File
25 lines
838 B
Bash
Executable File
#!/usr/bin/env bash
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# Build the Approach-(B) shim: the ClassicPeer driver + host + bridge.
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# Requires JAVA_HOME/javac on PATH and the genuine Robocode 1.9.5.5 jar.
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#
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# ROBOCODE_JAR=/path/to/robocode.jar ./build.sh
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set -euo pipefail
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HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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ROBOCODE_JAR="${ROBOCODE_JAR:-/tmp/robocode/install/libs/robocode.jar}"
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OUT="${OUT:-$HERE/out}"
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if [[ ! -f "$ROBOCODE_JAR" ]]; then
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echo "robocode.jar not found: $ROBOCODE_JAR" >&2
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echo "Set ROBOCODE_JAR to a Robocode 1.9.5.5 install's libs/robocode.jar" >&2
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exit 1
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fi
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mkdir -p "$OUT"
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javac -nowarn -cp "$ROBOCODE_JAR" -d "$OUT" \
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"$HERE/src/robocode_shim/ClassicPeer.java" \
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"$HERE/src/robocode_shim/BotHost.java" \
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"$HERE/src/robocode_shim/TankRoyaleBridge.java" \
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"$HERE/src/robocode_shim/SmokeTest.java"
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echo "shim built -> $OUT"
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